2 # This file is included by the global makefile so that you can add your own
3 # architecture-specific flags and dependencies.
5 # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 # Licensed under the GPL
10 OS := $(shell uname -s)
11 # We require bash because the vmlinux link and loader script cpp use bash
15 filechk_gen_header = $<
17 core-y += $(ARCH_DIR)/kernel/ \
18 $(ARCH_DIR)/drivers/ \
21 MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
23 HEADER_ARCH := $(SUBARCH)
25 # Additional ARCH settings for x86
26 ifeq ($(SUBARCH),i386)
29 ifeq ($(SUBARCH),x86_64)
33 include $(srctree)/$(ARCH_DIR)/Makefile-skas
34 include $(srctree)/$(ARCH_DIR)/Makefile-$(HEADER_ARCH)
36 SHARED_HEADERS := $(ARCH_DIR)/include/shared
37 ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
38 ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(HEADER_ARCH)/shared
39 KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(HEADER_ARCH)
41 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
42 # named - it's a common symbol in libpcap, so we get a binary which crashes.
44 # Same things for in6addr_loopback and mktime - found in libc. For these two we
45 # only get link-time error, luckily.
47 # These apply to USER_CFLAGS to.
49 KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
50 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
51 -Din6addr_loopback=kernel_in6addr_loopback \
52 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
54 KBUILD_AFLAGS += $(ARCH_INCLUDE)
56 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
57 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
58 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
60 #This will adjust *FLAGS accordingly to the platform.
61 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
63 KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include
65 # -Derrno=kernel_errno - This turns all kernel references to errno into
66 # kernel_errno to separate them from the libc errno. This allows -fno-common
67 # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
69 # These apply to kernelspace only.
71 # strip leading and trailing whitespace to make the USER_CFLAGS removal of these
74 KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
75 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
76 KBUILD_CFLAGS += $(KERNEL_DEFINES)
87 echo '* linux - Binary kernel image (./linux) - for backward'
88 echo ' compatibility only, this creates a hard link to the'
89 echo ' real kernel binary, the "vmlinux" binary you'
90 echo ' find in the kernel root.'
93 KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
95 archprepare: include/generated/user_constants.h
97 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
98 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
100 CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
101 $(call cc-option, -fno-stack-protector,) \
102 $(call cc-option, -fno-stack-protector-all,)
104 # Options used by linker script
105 export LDS_START := $(START)
106 export LDS_ELF_ARCH := $(ELF_ARCH)
107 export LDS_ELF_FORMAT := $(ELF_FORMAT)
109 # The wrappers will select whether using "malloc" or the kernel allocator.
110 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
112 LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
114 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
116 $(CC) $(CFLAGS_vmlinux) -o $@ \
117 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
118 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
120 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
121 FORCE ,$^) ; rm -f linux
124 # When cleaning we don't include .config, so we don't include
125 # TT or skas makefiles and don't clean skas_ptregs.h.
126 CLEAN_FILES += linux x.i gmon.out
129 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
130 -o -name '*.gcov' \) -type f -print | xargs rm -f
134 $(ARCH_DIR)/sys-$(HEADER_ARCH)/user-offsets.s: FORCE
135 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(HEADER_ARCH) $@
137 define filechk_gen-asm-offsets
140 echo " * DO NOT MODIFY."; \
142 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
146 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
150 include/generated/user_constants.h: $(ARCH_DIR)/sys-$(HEADER_ARCH)/user-offsets.s
151 $(call filechk,gen-asm-offsets)
153 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH